Non-US date format in Thunderbird in KDE

Just modify Thunderbird in Kickoff:

export LC_ALL=en_GB.utf8; thunderbird %u
This way you'll have European date format irrespective of system-wide KDE language settings (which do not seem to be obeyed by Thunderbird BTW)

Open JAR files in Krusader (UPDATE: and WAR as well)

On my Mint box Krusader opens JARs in Ark by default. I prefer to treat them as normal archive files, browseable in Krusader. In settings choose Protocols, then find application/x-java-archive in Mimes (bottom-right corner) and move it to Links.

For WAR - do the same for application/x-webarchive type

Add remote origin to an existing Git repo

atoe@atoe$ ~/somerepo git remote add --track master origin /home/atoe/Dropbox/gitrepos/somerepo.git

That's it. See that post, especially comments.